I want share my remixes. http://www.thingiverse.com/thing:1777271Nema 23 parts for X and Z axis. I did NOT tested.Maybe this http://www.thingiverse.com/thing:1452846 for Y motor mount is better option because is smaller and you need less material. I have this on my Prusa i3 Rework and all axis runs on Nema23. Works very good and fast.